ScienceDaily: Engineering and Construction News

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Chitosan: Sustainable alternative for food packaging Posted: 09 Jan 2015 05:46 AM PST A material known as chitosan, made from crustacean shells, has been used to substitute petroleum by-products in food packaging. The environment is seriously affected by the use of food packaing: plastic bottles and films are present everywhere in our civilization and take between 100 and 400 years to degrade. So the quest for alternative materials to plastics produced from petroleum is an environmental priority.

Making synthetic materials more impervious: fewer plastic substances in food Posted: 09 Jan 2015 01:55 AM PST Synthetic materials are convenient in many respects, but they have one disadvantage: they are permeable to gases. In order to make plastic more impervious, engineers apply wafer-thin layers on surfaces. This would not only increase the shelf life of food in plastic packaging, but would also prevent the migration of substances from the plastic into the food.

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